The ES-FA-6G is a Safety Relay Module with polycarbonate housing. This ES-FA-series relay has 3PST-NO contacts, DIN-rail mount and screw terminals. This module monitors one single-channel normally closed emergency stop switch circuit for a contact failure or wiring fault. Its purpose is to increase the control reliability of an emergency stop circuit. This safety module features three output switching channels for connection to control-reliable power interrupt circuits and one auxiliary non-safety N/C output contact for status monitoring by process controller. Design complies with standards UL991, EN418 and EN954-1 (safety category 2). For use in functional stop category 0 applications per NFPA 79 and EN418.